Fiber silica composite microsphere for shale stratum, drilling fluid and preparation method and use thereof

US11345841B1 · kind B1 · utility

Assignee

• Southwest Petroleum University · CN

Inventors

• Yang Bai · Beaverton, US
• Lingfeng Wu · Chengdu, CN
• Pingya Luo · Chengdu, CN
• Wenzhe Li · Middletown, US
• Feng-Wei Dai · Beijing, CN
• Gang Xie · Nanhu, CN
• Haibo Liang · Beijing, CN
• Kesheng Rong · Chengdu, CN
• Jiading Deng · Chengdu, CN

Key dates

• Filing date: Oct 19, 2021
• Grant date: May 31, 2022
• Expiry date: Oct 19, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/14
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A fiber silica composite microsphere for a shale stratum comprises a hollow silica sphere and fibers, and the fibers are partially coated on an outer surface of the hollow silica sphere and partially embedded into an interior of the hollow silica sphere. The hollow silica sphere has an outer diameter of 1-5 μm and an inner diameter of 0.8-4.7 μm; the fibers have a length of 5-10 μm and a width of 1-3 μm.